In this paper of Collimator control system we discuss the beam shaping device namely secondary collimator which creates field intensity. Due to different arrangement of jaws different field size can be created. The hardware design for control of collimator for treatment of cancerous tissue leads towards the conformal treatment and thereby sparing good tissue which leads toward the increase in quality of treatment. Cadence FPGA System planner is used to generate the schematic for the hardware of collimator. VHDL code is written in XILINX ISE 13.9 and it is implemented on SPARTAN 6LX9TQG 144. VHDL code is tested on design PCB.